MESON Chess Problem Database

Problem Display
PID: 142870 (5Q2/r1pB4/R2N2qb/3k1p2/1p1P1n2/1P3Pp1/4N3/1K6 w - - 0 1)

Dubernat, R

1/2 HM., La Cle 05. Beginners' Ty., 1971

5Q2/r1pB4/R2N2qb/3k1p2/1p1P1n2/1P3Pp1/4N3/1K6

#2

9 + 9

274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Bc6#
    • 1...Qg8
      • 2.Qxf5#
    • 1...Se6
      • 2.Bc6#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Se3#
        • 2.Qc5#
      • 1...Bxf8
        • 2.Se3#
      • 1...Sxe2
        • 2.Qc5#
      • 1...Qe8
        • 2.Qc5#
      • 1...Qb6
        • 2.Se3#
        • 2.Qxf5#
      • 1...Qc6
        • 2.Se3#
        • 2.Qxf5#
      • 1...Qd6
        • 2.Se3#
      • 1...Qe6
        • 2.Qc5#
      • 1...Sg2
        • 2.Qc5#
      • 1...Sh3
        • 2.Qc5#
      • 1...Sh5
        • 2.Qc5#
      • 1...Se6
        • 2.Bc6#
      • 1...c5
        • 2.Se3#
        • 2.Qxc5#
      • 1...Sd3!
    • 1.Ra5+?
      • 1...c5
        • 2.Rxc5#
      • 1...Rxa5!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qc5#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Bxf8
        • 2.Sxf4#
      • 1...Sd3
        • 2.Se7#
      • 1...Qb6
        • 2.Se3#
      • 1...Qc6
        • 2.Se3#
      • 1...Qd6
        • 2.Se3#
      • 1...Se6
        • 2.Bc6#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(f);SBLOCK::B(H)
    • Q(f);N_GUARD::QAR2(I),XP(e)
    • S(c);SBLOCK::B(H)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XQ(I)::S(G)
        • S(c);XS(B)::QAR1(I)
        • Q(f);::QAR1(I)
        • Q(f);::S(G)
        • S(c);::QAR1(I)
        • S(c);SBLOCK,S_CUTQ(f)::B(H)
      • Refutation
        • S(c);
    • Try
      • R(F);CHECK
      • Vars
        • P(i);P_SPINP(i)::R1(F),XP(i)
      • Refutation
        • R(h);XR(F)
  • Actual
    • S(G);P_SPINS(G),XP(e)
    • Threat
      • QAR1(I)
    • Vars
      • Q(f);CHECK,OGATE,XS(G)::QAR2(I),XQ(f)
      • B(g);N_GUARD,XQ(I)::S(B),XS(c)
      • S(c);N_PINS(G)::S(G)
      • Q(f);N_PINS(G)::S(G)
      • S(c);SBLOCK,S_CUTQ(f)::B(H)
      • P(i);::QAR1(I),XP(i)
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